Trolley.



UNITED STATES PATENT OFFICE.

EDWARD P. HINCHBERGER, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR 0F ONE-THIRD TO SARAH HINCI-IBERGER, 0F PITTSBURGH, PENNSYLVANIA.

TROLLEY.

Specication of Letters Patent.

l Patented Feb. 6, 1912.

Application filed June 17, 1911. Serial No. 633,665.

To all whom t may concern Be it known that I, EDWARD P. HINoH- BERGER, acitizen of the United States of America, residing at Pittsburgh, in thecounty of Allegheny and State of Pennsylvania, have invented certain newand useful Improvements in Trolleys, of which the following is aspecification, reference being had therein to the accompanying drawing.

This invention relates to trolleys, and the objects of my invention areto provide a trolley harp with yieldable guard plates that will recedewhen bridge rails, frogs or other over-head construction is encountered,and to provide guard plates that will be normally maintained in positionto prevent accidental displacement of a trolley wheel relatively to atrolley wire, rail or electric conductor.

Further objects of my invention are to provide yieldable guard platesthat can be easily applied to the present type of trolley harp, and toaccomplish the above results by a mechanical construction that isinexpensive to manufacture, free from injury by ordinary use andefficient for the purposes for which it is intended.

These and such objects as may hereinafter appear are attained by thenovel construction, combination and arrangement of parts to behereinafter specifically described and then claimed.

Reference will now be had to the drawing, wherein Figure 1 is a sideelevation of the trolley wheel in accordance with this invention, andFig. 2 is a vertical sectional view of the same showing the harp bydotted lines.

The reference numeral 1 denotes the tubular hub of a grooved trolleywheel 2 and loosely mounted upon said hub are the sleeves 3 of pressuremembers 4, said members having radially disposed arms 5 reinforced by aradially disposed rib 6, the members 4 are adapted to engage the outersides of circular guard plates 7 having large central openings 8providing clearance for the hub 1 of the wheel 2. The plates 7 are of agreater diameter than the wheel 2 where by the edges ofsaid plates willproject above the periphery of the Jtrolley wheel 2. The outer sides ofthe guard plates 7 are pro vided wth a plurality of apertured lugs 9 andconnected to said lugs by links 10 are the outer convolutions of coiledsprings 1l having the inner convolutions mounted over stud pins 12carried by the sleeves 3. j

The pressure members 4 normally hold the guard plates 7 in engagementwith the sides of the trolley wheel 2, and to retain the sleeves 3 ofsaid pressure members upon the hub 1, the ends of the hub are providedwith circular heads 13 secured in position by set screws orv otherfastening means 14. The heads 13 have central openings 15 alining withthe bore of the hub 1. The hub 1 is adapted to receive the spindle orjournalpin 16 of a harp 17, it being preferable to mount the pin in theharp 17 whereby the wheel 2 can revolve upon said pin.

From the foregoing it will be observed that the pressure membersnormally retain the guard plates in engagement with the wheel 2 and thatthe openings 8 of said plates allow said plates to recede when over-headconstructions are encountered by said plates. Under ordinarycircumstances the plates 7 provide a groove of considerable depth forthe trolley wire, consequently the liability of the trolley wheel beingdisplaced, due to high speed and trolley wire irregularities, is reducedto a minimum.

The invention is not limited to the size or material used in theconstruction of the improvement, and other changes can be made withoutdeparting from the scope of the appended claims.

What I claim is 1. In a trolley, the combination with a trolley wheelhaving a hub, of pressure members arranged upon said hub, circular guardplates arranged between said members and said wheel, apertured lugscarried by the outer sides of said guard plates, and springs interposedbetween said members said lugs, substantially as described.

2. In a trolley, the combination with a. trolley wheel having a hub, ofpressure members arranged upon said hub, circular guard plates arrangedbetween said members and said wheel, apertured lugs carried by the outersides of said guard plates, springs interposed between said members andsaid lugs, and heads secured to the ends of the hub of said wheel andadapted to retain said pressure members thereon.

3. In a trolley, the combination with a trolley wheel having a hub, ofpressure members arranged upon the ends of the hub thereof ried by saidmembers, circular guard plates of said wheel, radially disposed armsoarbers upon the ends of the hub of said wheel, 10

K substantially as described. encircling the hub of said wheel andretained In testimony whereof I afiX my signature in engagement with thesides of said Wheel b d b h f in the presence of two witness.

y sai mem ers and t e arms thereo apertured lugs carried by the outersides df said EDWARD P HINCHBERGER' guard plates," springs interposedbetween Witnesses:

said members and said lugs, and means in- SARAH HINCHBEBGER,

cluding heads adapted to retain said mem- MAX H. SROLOWTZ.

Copies of this patent m'ay be obtained for ve cents each, by addressingthe Commissioner of Patents,

' Washington, ZD. C.

